Products

AISI D2 / DIN 1.2379 /SKD11 Tool Steel Bar

China AISI D2 / DIN 1.2379 /SKD11 Tool Steel Bar, Find details about China AISI D2 Tool Steel, 1.2379 Tool Steel Bar from AISI D2 / DIN 1.2379 /SKD11 Tool Steel Bar

Model NO.
KM-81
Special Use
Mold Steel, Cold Heading Steel
Size
130mm-1000mm (Optional)
Length
2m,3m,5.8m, 6m, 8m or as Required.
Delivery Time
7-30 Days
Loading Port
Shanghai
MOQ
3 Tons
Certificate
ISO, BV, SGS, Mill Test Certificate
Packaging Detail
Standard Sea-Worthy Package
Surface
Bright, Black
Price Term
Ex-Work, Fob, CFR, CIF, etc.
Specifications
Flat Bar, Round Bar, Angle Bar, Square Bar
Trademark
Kingmetal
Transport Package
Standard Sea-Worthy Package
Specification
130mm-1000mm (optional)
Origin
China (Mainland)
Model NO.
KM-81
Special Use
Mold Steel, Cold Heading Steel
Size
130mm-1000mm (Optional)
Length
2m,3m,5.8m, 6m, 8m or as Required.
Delivery Time
7-30 Days
Loading Port
Shanghai
MOQ
3 Tons
Certificate
ISO, BV, SGS, Mill Test Certificate
Packaging Detail
Standard Sea-Worthy Package
Surface
Bright, Black
Price Term
Ex-Work, Fob, CFR, CIF, etc.
Specifications
Flat Bar, Round Bar, Angle Bar, Square Bar
Trademark
Kingmetal
Transport Package
Standard Sea-Worthy Package
Specification
130mm-1000mm (optional)
Origin
China (Mainland)

AISI D2 / DIN 1.2379 /SKD11 tool steel bar

1.Supply Form & Size & Tolerance

Supply FormSize(mm)ProcessTolerance



Round		Φ6-Φ100Cold DrawnBright/BlackBest H11

Φ16-Φ350
Hot Rolled		Black-0/+1mm
Peeled/groundBest H11

Φ90-Φ1000
Hot Forged		Black-0/+5mm
Rough Turned-0/+3mm

Flat/Square/Block		Thickness :120-800
Hot Forged		Black-0/+8mm
Width:120-1500Rough Machined-0/+3mm

Remark:Tolerance can be customized as per requests

2.Chemical Composition

StandardGradeCSiMnPSCrVMo
ASTM A681D21.4-1.60.1-0.60.1-0.60.030.0311.0-13.00.5-1.10.7-1.2
DIN ISO 49571.23791.45-1.60.15-0.60.2-0.60.030.0311.0-13.00.7-1.00.7-1.0
JIS G4404SKD111.4-1.60.40.60.030.0311.0-13.00.2-0.50.8-1.2

3.Physical Property

Temperature20°C200°C400°C
Melting point1421°C
Density ,kg/m3770076507600
Modulus of elasticity,Mpa210000200000180000

Coefficient of thermal expansion		low temperature tempering per °C from 20°C-12.3 x 10^-6-
high temperature tempering per °C from 20°C-11.2 x 10^-612 x 10^-6
Thermal conductivity,W/m °C202123
Specific heat,J/kg °C460--

4. Mechanical Property

 MetricImperial
Hardness, Knoop (converted from Rockwell C hardness)769769
Hardness, Rockwell C6262
Hardness, Vickers748748
Izod impact unnotched77.0 J56.8 ft-lb
Poisson's ratio0.27-0.300.27-0.30
Elastic modulus190-210 GPa27557-30457 ksi

5.Copressive Strength

HardnessCompressive yield strength, Rc 0.2
HRCMpaksi
622200319
602150312
551900276
501650239

6.Forging

Heat the D2 tool steel slowly and uniformly to 700°C then more rapidly to 900-1040°C. Reheat is necessary when temperature is below 900°C.AISI D2 steel  should be cooled as slowly as possible in furnace,and annealing is strongly recommended after forged.

7.Annealing

Annealing must be performed after hot working and before re-hardening. Heat at a rate not exceeding 220°C per hour to 870-900°C, and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 20°C per hour to 530°C. Continue cooling to room temperature in the furnace or in air. The resultant hardness should be a maximum of 255 HBW.

8.Sress Relieving 
After rough machining,AISI D2 steel  should be heated throughly to 600-650°C, holding time 2 hours. Cool slowly to 500°C, then freely in air.

9.Hardening

Preheating temperature: 650-750°C.
Austenitizing temperature: 990- 1050°C, but usually 1000-1040°C.

Temperature , °CSoaking time Min.Hardness before tempering
99060approx. 63 HRC
101045approx. 63 HRC
103030approx. 63 HRC

Quenching Media
• Oil (Only very simple geometries)
• Vacuum (high speed gas)
• Forced air/gas
• Martempering bath or fluidized bed at 180-500°C, then cooling in air.

10.Tempering

Temper immediately after quenching. Hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum, then air cool to ambient temperature. The typical tempering range is 180 to 210ºC.Double tempering is recommended.

Temperature ,°C150200250300350400
Hardness,HRC62-6161-6060-5957-5656-5556-55

11.Application

AISI D2 is used in a wide variety of tool making applications.Use D2 for applications requiring long runs and close tolerances. Use it for tools and dies for blanking, punching, forming, cold-extruding, and other operations requiring high compressive strength and excellent wear resistance.

Typical applications includes :Cutting, punching, stamping tools, shear blades, thread rolling dies, cold extrusion dies, drawing and bending tools, flanging and straightening rolls, fine cutting tools, deep drawing tools, plastic moulds for abrasive polymers

AISI D2 / DIN 1.2379 /SKD11 Tool Steel Bar
AISI D2 / DIN 1.2379 /SKD11 Tool Steel Bar
AISI D2 / DIN 1.2379 /SKD11 Tool Steel Bar



 

You Might Also Like